<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>Title</title>
</head>
<body>

<script src="../js/vue.js"></script>
<div id="app">
  <img v-bind:src="imgUrl" alt="">
  <img :src="imgUrl" alt="">
</div>

<script>
  const app = new Vue({
    el: '#app',
    data: {
      message: "第一次，系统的学VUE",
      imgUrl: "https://www.baidu.com/img/PCpad_012830ebaa7e4379ce9a9ed1b71f7507.png"
    }
  })
</script>

</body>
</html>